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JEE Main & Advanced JEE Main Solved Paper-2016

  • question_answer
    The pair in which phosphorous atoms have a formal oxidation state of + 3 is :- [JEE Main Solved Paper-2016 ]

    A) Pyrophosphorous and pyrophosphoric acids

    B) Orthophosphorous and pyrophosphorous acids

    C)  Pyrophosphorous and hypophosphoric acids

    D) Orthophosphorous and hypophosphoric acids

    Correct Answer: B

    Solution :

    Acid Formula Formal oxidation
    Pyrophosphorous acid \[{{H}_{4}}{{P}_{2}}{{O}_{5}}\] +3
    Pyrophosphoric acid \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] +5
    Orthophosphorous acid \[{{H}_{3}}P{{O}_{3}}\] +3
    Hypophosphoric acid \[{{H}_{4}}{{P}_{2}}{{O}_{6}}\] +4
    Both pyrophosphorous and orthophosphorous acids have +3 formal oxidation state


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